The best is number one and the worst is the one in last.
I'll make a discussion for this on the Forums so you can talk about if you agree or not and what changes you'd make.
1. Episode 1: Lazarus Rising-I was so glad to see Dean get out of Hell, and the twist at the end was something no one expected to see.
2. Episode 22: Lucifer Rising-The title sums it up. And who else was super happy that Dean killed Ruby?
3. Episode 16: On the Head of a Pin-The whole Dean/Alastair thing was enough to make this episode awesome, but Dean finding out he started the whole freeing Lucifer thing was so sad.
4. Episode 2: Are You There, God? It’s Me… Dean Winchester-Seeing all the old faves from previous episodes was great.
5. Episode 6: Yellow Fever-Dean’s scream alone makes this episode good.
6. Episode 14: Sex and Violence-The fight between Sam and Dean… did anyone else cry?
7. Episode 21: When the Levee Breaks-Hello Mama Winchester! Sam’s weird hallucinations were a great part of this ep.
8. Episode 15: Death Takes a Holiday-Ghost Sam and Dean are just as sexy and Reaper Tessa was a nice touch.
9. Episode 19: Jump the Shark-I was worried about this episode but I found myself loving little Winchester. Then finding out he was dead was too sad, granted I wasn’t expecting to see him in the backseat of the Impala forever.
10. Episode 13: After School Special-Seeing young Sam and Dean is always my favorite thing.
11. Episode 9: I Know What You Did Last Summer-Everyone hated the Ruby/Sam sex scene, I’m still mad at him for that, but I did enjoy seeing what went on.
12. Episode 5: Monster Movie-Oh Shapeshifters! The salute to old black&white films was great.
13. Episode 20: The Rapture-I loved getting to know Jimmy, but I was worried the producers were going to pull a Ruby and change the character.
14. Episode 11: Family Remains-Although I don’t like episode involving just people, this episode was creepy!
15. Episode 10: Heaven and Hell-The Demon/Angel fight at the end was awesome, but does anyone else not like Anna?
16. Episode 7: It’s the Great Pumpkin Sam Winchester-I was so proud that Sammy killed the bad guy, but the way he did it did not make me happy.
17. Episode 18: The Monster at the End of This Book-Our boys are more special than we thought! And I absolutely love Chuck.
18. Episode 17: It’s a Terrible Life-This episode was kind of a waste. The Ghostfacers cameo was great and the awkwardness of normal Sam and Dean was hilarious.
19. Episode 3: In the Beginning-I loved seeing young Mom and Dad, but Dean couldn’t change anything, so what was the point?
20. Episode 8: Wishful Thinking-Funny episode, but not the best.
21. Episode 12: Criss Angel Is a Douche Bag-Funny as the title, but magicians are people and the show is not Crazy People!
22. Episode 4: Metamorphosis-This episode was creepy but I always forget about it! It just didn’t have a great effect on me.
Season 4 Best/Worst Villans
1. Alastair: Episode 9, 10, 15, 16-He was the guy who gave our boys the most trouble. Not to mention torturing poor Dean.
2. Siren: Episode 14-That episode totally had be confused. I thought it was the doctor but it wasn’t. Tricky thing.
3. Ghosts of the past: Episode 2-The ghosts were badass.
4. Lillith-Because shes a bitch.
5. Ghouls: Episode 19-Ghouls are gross.
6. Shapeshifter: Episode 5-I love shapeshifters, but this one I kind of felt bad for.
7. Ghost Sickness: Episode 6-Made everything funny.
8. Uriel: Episode 16-I was so upset that he was bad.
9. Rugaru: Episode 4-I didn’t like the episode but that is one scary monster.
10. Ruby-I hate her for manipulating our boys, especially Sam.
Season 3 Best/Worst Episodes
1. Episode 13: Ghostfacers-The episode had everything.
2. Episode 10: Dream a Little Dream of Me-Finding out how Bobby got into hunting was not something I was expecting to see. And the Dean on Dean fight seen was amazing!
3. Episode 16: No Rest for the Wicked-The saddest episode ever.
4. Episode 1: The Magnificent Seven-"What's in the box!?"
5. Episode 8: A Very Supernatural Christmas-Gotta love a scary Christmas.
6. Episode 7: Fresh Blood-How awesome/scary was the way Sam killed Gordon?
7. Episode 11: Mystery Spot-So funny, yet sad at the same time.
8. Episode 12: Jus in Bello-Hendrickson finally liked Sam and Dean. And I finally liked Hendrickson.
9. Episode 3: Bad Day at Black Rock-Our intro to Bela Bitch.
10. Episode 9: Malleus Maleficarum-We get a taste of what Ruby was like and that people become Demons in Hell.
11. Episode 4: Sin City-I actually liked the girl demon a lot. And Dean had someone to talk to.
12. Episode 5: Bedtime Stories-Fairytales are awesome, but I don't know how I really feel about this episode.
13. Episode 2: The Kids Are Alright-Mini Dean was adorable, but thank Castiel it wasn't Deans. Dean a father? No.
14. Episode 14: Long-Distance Call-It was good to hear Daddy Winchesters voice, but the episode didn't offer much. Just made me sad it wasn't really John on the phone.
15. Episode 6: Red Sky at Morning-I loved how the ghosts turned into water, cool effect, but why save Bela!?
16. Episode 15: Time Is on My Side-Good idea and the guys insides falling out was scary, but Doc Benton wasn't that exciting. I kind of felt bad for him. But Bela finally got what she deserved.
Season 3 Best/Worst Villans
1. Trickster: Episode 11-Do I even need to explain?
2. Seven Deadly Sins: Episode 1-You can't go wrong with the seven deadly sins.
3. Lilith: Episodes 12 and 16-She's pretty important. She's the big bad.
4. Demons: Episodes 4 and 9-Always good.
5. Gordon: Episode 7-He is dillusional.
6. Bela: Episodes 3 and 6-I'm jealous of her money, but I hate her.
7. Ghosts: Episode 5 and 6-They pop out of nowhere.
8. Pagan Gods: Episode 8-Funny couple, just don't let them get near your hands or mouth.
9. Crocotta: Episode 14-Scary mouth.
10. Crazy Hostpital Janitor Ghost: Episode 13-Someone seriously needed some medication.
11. Witches: Episode 9-They're unsanitary.
12. Rabbits Foot: Episode 3-Funny episode but a rabbits foot is really weird for this show.
13. Changeling: Episode 2-Creepy kids are not my fave.
14. Doc Benton: Episode 15-See Worst Episode.
Season 2 Best/Worst Episode
1. Episode 22: All Hell Breaks Loose: Part 2-How happy were you that Y.E.D. was dead?
2. Episode 21: All Hell Breaks Loose: Part 1-“Sammy!” Could have made anyone cry.
3. Episode 1: In My Time of Dying-Reapers. Dean being saved. Great.
4. Episode 12: Nightshifter-Everybody loves a Shapeshifter.
5. Episode 15: Tall Tales-Too funny to not like.
6. Episode 14: Born Under a Bad Sign-Seeing Sammy evil? Shows us what’s to come.
7. Episode 20: What Is and What Should Never Be-Poor Dean.
8. Episode 2: Everybody Loves a Clown-Clowns are creepy. Enough said.
9. Episode 4: Children Shouldn’t Play with Dead Things-Zombies are creepy. Enough said.
10. Episode 5: Simon Said-Andy’s awesome.
11. Episode 7: The Usual Suspects-Deans quotes are enough to love this episode.
12. Episode 13: Houses of the Holy-Angels don’t exist? Who knew that they would actually be in the show in Season 4.
13. Episode 10: Hunted-Oh Gordon.
14. Episode 11: Playthings-Creepy dolls, gay jokes and a haunted hotel. What’s not to love? And drunk Sam is the best!
15. Episode 18: Hollywood Babylon-Funny, but a little dumb.
16. Episode 3: Bloodlust-Love seeing Tara from Buffy, but her acting was bad.
17. Episode 19: Folsom Prison Blues-It’s funny how well Dean fitted in.
18. Episode 8: Crossroad Blues-Get a taste of what’s to come for Deano.
19. Episode 9: Croatoan-Interesting, but really didn’t do anything. Why was Sam immune? What was the importance? Where did the people go?
20. Episode 16: Roadkill-They could’ve done without the white-light.
21. Episode 6: No Exit-Jo is super annoying and the mistakes about H.H. Holmes needed to be fixed.
22. Episode 17: Heart-The werewolf’s were lame and the girl was desperate. But Sam without a shirt… yum.
Season 2 Best/Worst Villans
1. Trickster: Episode 1-How can you not love him?
2. Shapeshifter: Episode 12-You can never go wrong with one.
3. Y.E.D: Episodes 1, 21, 22-He's the reason Sam and Dean are hunters.
4. Jake and Ava: Episodes 21-22-Just because you like them at first but then they became bad.
5. Meg: Episode 14-Meg is Meg.
6. Crossroad Demons and Hellhounds: Episode 8-We got a taste of what would happen to Dean
7. Ghosts: Episodes 11, 16, 18, 19-Ghosts are easy to get rid of, sometimes.
8. Djinn: Episode 20-How cool/sad was that episode?
9. Gordon: Episode 10-Cause you love to hate him.
10. Werewolf: Episode 17-Granted I didn't like Supernaturals werewolves, werewolves in general are awesome.
11. Rakshasa: Episode 2-Creepy MoFo.
12. Reaper: Episode 1-Because they have their own song.
13. Psychics: Episode 5-They're better than being normal.
14. Demons/Virus: Episode 9-Even though Croatoan wasn't exciting, Demons know how to bring it.
15. Zombie: Episode 4-She broke Sam's hand.
16. H.H. Holmes: Episode 6-Even though he is America's first serial killer, doesn't mean he has to be the creepy.
Best/Worst Episodes
1. Episode 1: Pilot-I mean, Hello? It’s the Pilot. It was the start of my obsession. I love it no matter how good or bad it was.
2. Episode 6: Skin-The start of everyone’s Shapeshifter fascination. And… Dean shirtless. Not to mention that painful-looking shifting.
3. Episode 17: Hell House-Introduced us to our awesome Ghostfacers. Also, Sam and Dean’s funny side comes out in full force.
4. Episode 12: Faith-Dean wants to kill the fabric softener bear and shows us that there is more than one Reaper. And who can forget the perfect placement of B.O.C.
5. Episode 4: Phantom Traveler-Cristo! We get to see what Dean fears the most.
6. Episode 5: Bloody Mary-A favorite childhood game. Dare you to say her name three times. Sam and Deano both have some secret within that Mary can pull out of them.
7. Episode 10: Asylum-Reminiscent of House on Haunted Hill, this episode focuses on a pretty freaky place.
8. Episode 11: Scarecrow-Sam and Dean’s first big fight, and we meet Meg.
9. Episode 21: Salvation-Everything’s coming to head in this episode and daddy Winchester plays a major role.
10. Episode 7: Hookman-I love my Urban Legends and this episode does a good job, but the annoying girl desperate for attention pulls this episode down on my list.
11. Episode 14: Nightmare-Psychic kids are not all as sane as Sammy.
12. Episode 16: Shadow-Meg is back, and we figure out what her deal really is.
13. Episode 22: Devil’s Trap-Not a fantastic finale compared to the others, but the cliffhanger at the end made everyone nervous.
14. Episode 19: Provenance-It’s nice to see Sammy start to like a girl, and compared to the other girls, she’s the best. And deaths were pretty gruesome.
15. Episode 2: Wendigo-Neat monster but the lead girl is a bit annoying.
16. Episode 18: Something Wicked-A different kind of witch, one that’s a lot creepier than in season 3. The flashbacks of young Sam and Dean were great but it was a little slow.
17. Episode 20: Dead Man’s Blood-I love Vampires, but Supernatural’s vamps aren’t my fave.
18. Episode 3: Dead in the Water-Good but not great. Fred from Angel as a Guest Star made this episode better.
19. Episode 9: Home-Thankful to see that Daddy Winchester was ok and seeing Mommy Winchester was nice, but the episode was a little dull.
20. Episode 15: The Benders-The show is Supernatural, not Crazy People.
21. Episode 8: Bugs-Creepy crawlers are not my favorite thing.
22. Episode 13: Route 666-Dean hooking up with that girl was just annoying because she was. Racial issues are not something I want to see in this show.
Season 1 Best/Worst Villan
1. Meg: Episode 11-22-She caused a lot of problems for the boys.
2. Skin Shapeshifter: Episode 6-Who doesn’t love a Shapeshifter?
3. Bloody Mary: Episode 5-She’s a scary women.
4. Phantom Traveler: Episode 4-Our first encounter with a Demon.
5. Dr. Ellicot: Episode 10-He’s one crazy man.
6. Yellow Eyed Demon: Episode 22-He’s only introduced here, but he’s the guy that started it all, which makes him pretty important.
7. Peter (Ghost Boy): Episode 3-Who is afraid of the monster in the lake?
8. Provenance Ghost Girl: Episode 19-She’s a very creepy and disturbed little girl.
9. Nightmare Max Miller: Episode 14-You almost feel bad for him, until you see that he would’ve killed Dean.
10. Constance (Women in White): Episode 1-She was our first villan we got to see.
11. Mrs. Le Grange: Episode 12-Whoever can control a Reaper is a major Badass.
12. Tulpa: Episode 17-Because they can be pretty much whatever.
13. Vampires: Episode 20-Not to fond of Supernatural’s vamps but they’re ok.
14. Wendigo: Episode 2-He’s a better hunter than anything.
15. Shtriga: Episode 18-Creepy handprints automatically make you creepy.
16. The Benders: Episode 15-People don’t have rules.
17. Mom/Poltergeists: Episode 9-How cheesy was the introduction as Mama Winchester as a ghost?
18. Hookman: Episode 7-Great Urban Legend.
19. Evil Truck: Episode 13-Really?
20. Bug/Indians: Episode 8-Gross.